Let's not forget that electric airplanes are starting to make headway also, along with electric cars. In 50 years, maybe a lot of small, private aviation will have switched to all electric. Not sure that's viable for large commercial aviation or the military (assuming no world peace by then).
Here's an article with some under the hood shots of the electric motor
Siemens says electric will become an industry standard by 2050 with a move to electrification already moving along much faster than the company expected.
“We might have a market ramp-up to a certified electric system by 2021, possibly before the end of 2020. We’ll be partnering with OEMs to help them integrate and maintain these electric systems,” Hamlin said.
The Chicago event also focused on how Siemens is currently working to bring electric aircraft to the marketplace, beginning with small aircraft like the Magnus and the Extra 330LE. Siemens used the Extra in 2017 to set a world speed and climb record in electric airplanes. The electrically powered Extra achieved a top speed of 211 mph and a climb record to 9,800 feet in four minutes 22 seconds.
Siemens is also blending the cyber and the physical worlds into its production process to reduce time to market for new products like a bearing shield displayed in Chicago. The shield is used in the Extra 330LE’s electric motor. When the original bearing shield was created, Siemens team created a digital twin that allowed them to continue redesigning, testing and optimizing a new version in a virtual reality world. Results were impressive as the original part was reduced in weight from 25 pounds to just 9 pounds.
The Extra 330 I believe normally flies with a 540 cubic inch flat 6 airpowered engine with 300+ horsepower. If I could fit a same-weight engine in place of my 360 cubic inch/180 HP and get 5 hour endurance, I could see switching over when my current engine was due for a major overhaul or replacement (a 25K USD to 50K USD effort).
(how do we get dollar signs to appear here without messing up the following font?)